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a.o.smtse Where is the oil tank of the range hood?

Below the fan suction port. a.o.smtse range hood is an American A.O. Smith brand product. The a.o.smtse range hood oil tank is in the shape of a rectangular parallelepiped below the fan suction port. Founded in 1874, American A.O. Smith is one of the North American manufacturers of household and commercial hot water equipment, water purification and boilers.